How to make this look human
It's not too bad. I couldn't say about the texture because your picture is too dark. But about the proportions I would say:


Lengthen the forehead
Shorten the chin
Scale down and spread the ears
Scale down and rise the nose up
Scale up the mouth and thicken the lower lip
Make the neck straight
...


To compare you could overlay your photo with your mesh, either in Blender or Photoshop.